Sentence Case Converter
Paste text to convert it to sentence case. Everything is lowercased, then the first letter of each sentence is capitalized and the word I is fixed.
How to convert to sentence case
- Paste your text into the box.
- The tool lowercases it and capitalizes the start of every sentence.
- Copy the cleaned, sentence-cased result.
Examples
Fix shouty, inconsistent text
HELLO world. this IS a test!
Hello world. This is a test!
Frequently asked questions
What counts as the start of a sentence?
The very start of the text and the first letter after a period, question mark or exclamation mark. That letter is capitalized.
Does it capitalize the word I?
Yes. The standalone pronoun i is always uppercased to I, including in contractions like i am, so your writing reads correctly.
Are line breaks preserved?
Yes. Newlines and your spacing are kept exactly as they were, so paragraphs and lists stay on their own lines.
How are multiple end marks handled?
Runs like ?! are treated as one sentence ending, so the next letter is capitalized once and the punctuation is left in place.
Is my text uploaded?
No. The conversion runs in your browser, so nothing you paste ever leaves your device.
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